US2863597A

US2863597A - Reinforced corrugated paperboard container and joint therefor

Info

Publication number: US2863597A
Application number: US603296A
Authority: US
Inventors: Philip C Strine
Original assignee: International Paper Co
Current assignee: International Paper Co
Priority date: 1956-08-10
Filing date: 1956-08-10
Publication date: 1958-12-09
Anticipated expiration: 1975-12-09

Description

Dec. 9, 1958 P. c. srRlNE REINFORCED CORRUGATED PAPERBOARD CONTAINER AND JOINT THEREFOR Filed Aug. 1o, 1956 I llllllllllllgv Anw/1 RW /w mm New@ M P m lll REINFORCED CORRUGATED PAPERBOARD CNTAINER AND JOINT THEREFOR Philip C. Strine, Chatham, N. J., assignor to International Paper Company, New York, N. Y., a corporation of N ew York Application August 10, 1956, vSerial No. 603,296

3 Claims. (Cl. 229-47) This invention relates in general to containers and reinforced structural panels for fabricating such containers, and particularly to a new and useful strap-reinforced container and to closure wall joints for such containers made by tearing away an outside covering of the panels to expose the reinforcing straps and thereafter securing together the ends of aligned straps of overlapping panels.

This invention is particularly applicable for the securing together of overlapping adjacent side walls and for securing together of overlapping closure panels `of containers or structural members which are made of corrugated paperboard or the like, reinforced by metal straps interposed between layers or laminae during the fabrication. The reinforcing straps in the case of corrugated paperboard panels, for example, are adhesively secured or held between the corrugated medium and an outside liner, or single or double faced corrugated paperboard is formed in the usual manner and an additional outer liner is adhesively secured over one of the faces with the metal straps disposed in between. It has been discovered in accordance with this invention that reinforced corrugated paperboard panels can be used to great advantage in the formation of structural walls, container side walls or container closures by utilizing the panels in such a way that adjacent panels can be fastened together by joining together the reinforcing straps after the covering has been peeled away to expose a short length of the straps.

Accordingly, it is an object of this invention to provide an improved container made from corrugated paperboard or the like, reinforced with strapping and having overlapping closure panels which are secured in a closing position by tightening and fastening together aligned ends of the reinforcing straps adjacent the overlapping panels.

Another object of this invention is to provide a connecting joint of overlapping structural panels made of corrugated paper board, or the like, and reinforced with integrally formed strapping.

A further object of this invention is to provide a container rugged in construction, simple in design and economical to manufacture.

For a better understanding of the invention, its operating advantages and specific objects attained by its use, reference should be had to the accompanying drawings and descriptive matter in which there is illustrated and described a preferred embodiment of the invention.

In the drawings,

Fig. l is a perspective view of an open container having overlapping top closure panels formed in accordance with this invention;

Fig. 2 is a perspective view of the container shown in Fig. 1, but with the top panels secured in a closed position;

Fig. 3 is a perspective view of two adjoining structural panels, the securing joint of which is formed in accordance with this invention;

Fig. 4 is a horizontal section taken on the line 4 4 of Fig. 3;

Fig. 5 is a perspective view of another embodiment of Patented Dec. 9, 1958 a securing joint for two structural panels formed in ac cordance with this invention; and

Fig. 6 is a horizontal section taken on the line 6-6 of Fig. 5.

Referring to the drawings in particular, the invention as embodied therein includes a container generally designated 10, made of corrugated paperboard having metal reinforcing straps 12 positioned between a corrugated medium 14 and an outside face or liner 16 thereof. The reinforcing straps 12 might be of other materials besides metal, such as a textile tape, plastic, leather or other ilexible materials having substantial tensile strength. The container 10 is generally rectangular in outline and is provided with a top closure panel 18 and a top closure panel 20 which are made long enough so that when they are in a closed position the panel 13 overlaps the panel 20. The straps 12 may be adhesively secured in position, but in some instances movement of the strap without crumpling of the corrugated paperboard is essential. In those cases the straps are not glued in place.

In accordance with the invention a strip 22 of the liner 16 is torn away in the area overlying the straps 12 immediately adjacent the outside edges of the

panels

18 and 20 to expose the ends of the reinforcing straps 12. To facilitate this peeling away of the layer covering the straps 12 the liner 16 is in some instances perforated or slit along lines overlying the sides of the straps. The straps 12 are peeled backwardly from the faces of the panels 18 and 2i) and the panels are placed in their normal closed position. Each securing strap 12 is then moved into overlapping relationship with its opposite end, drawn tight and then secured together by the usual strap-securing tool which applies a seal or fastener piece 23 to hold the strap ends tightly together.

In accordance with this invention reinforced structural panels made of corrugated paperboard, laminated bre board or the like, may be joined together in a manner similar to the forming of the above described container closure merely by overlapping a portion of one panel over an edge'portion of another and pulling away the faces of the panels overlying the reinforcing straps in locations adjacent each overlapped edge and securing the ends of the straps together by a strap-sealing machine with the usual fastener piece 23.

One type of overlapping panel-securing or container corner joint is shown in Figs. 3 and 4. In this instance there is provided a structural panel 24 and a similar panel 26 each made of reinforced corrugated paperboard. The panel 26 is provided with a ap 28 hingedly folded to overlap the front face of the panel 24. Strips 3i) of the outer liner of each panel are torn away to expose an underlying reinforcing strap 32. The adjacent ends of the strap are then overlapped one upon the other and secured by the usual strap-securing means 34.

Figs. 5 and 6 disclose another type of structural panelsecuring or container corner joint in which a straight panel 36 is secured to a panel 38 having an end portion 40 hingedly folded at right angles to the main portion and placed with its outer face in contact with the panel 36. In accordance with the invention the

panels

36 and 38 are secured together by peeling away strips 42 of the outer liner of each panel adjacent its outer edges to eX- pose an underlying reinforcing strap 44. Aligned slots 45, 4S are cut out from the panel 36 and the end portion 40 in an area adjacent the inner edge of the portion 40 and beneath the straps 44. The strap 44 on the panel 38 is passed through the slots 45 and bent beneath the strap 44 of the panel 36 and the two straps are drawn tight and secured with a seal 46.

The invention provides means for using structural panels made of corrugated paperboard, laminated fibre board or the like, and reinforced with metal strapping in any number of desirable ways. Reinforced structural panels can be fabricated as part of containers as shown in Figs. 1 and 2 which may be closed securely by fastening together the reinforcing straps in the manner de- Ascribed herein, or, the structural panels maybe used to form walls of large containers or similar structures which require reinforcement, and in such cases adjacent walls are fastened in the manner as described in Figs. 3 to 6.

While a specic'ernbodiment of the invention has been shown and described in detail to illustrate the application of the invention principles, it will be understood that the invention may be embodied otherwise without departing from such principles.

I claim:

1. A uniting joint for reinforced corrugated paperboard, laminated breboard or the like reinforced structural panels comprising overlying and underlying panels each consisting of layers of material and having an edge, a flat reinforcing strap for each panel held between layers of said material and normally confined in extent by a said respective panel edge, the material of each panel overlying a short length of each said strap adjacent its end being raised from the strap to expose the end of said strap, the exposed ends of the straps being in overlapping relationship, and fastening means to secure said overlapping ends of said straps together.

2. A uniting joint for reinforcing corrugated paperboard, laminated fibreboard or the like material structural panels comprising a rst panel consisting of layers of material and having a folded edge portion, a second panel consisting of layers of material and having a face in contact with the folded edge portion of said rst panel, a flat reinforcing strap for each panel held between layers of the material of the respective panels, a portion of at least one of said panels being cut away to form a slot aligned with a said strap, the material of each panel overlying a short length of each said strap adjacent its end being raised from the strap to expose the end of said strap, one of said straps extending through said slot and the exposed ends of the straps being in overlapping relationship, and fastening means to secure said overlapping ends of said straps together.

3. A container made from corrugated paperboard, laminated ibreboard or the like comprising a tubular body portion, two closure panels having overlapped edges and hingedly connected to said body portion, said body portion and panels consisting of layers of material, a at reinforcing strap held between said layers of material encircling said body portion and closure panels and normally confined in extent by the respective overlapped edges of said closure panels, the material of each panel overlying a short length of each said strap adjacent its end being raised from the strap to expose the end of said strap, the exposed ends of the straps being in overlapping relationship, and fastening means to secure said overlapping ends of said straps together.

References Cited in the le of this patent UNITED STATES PATENTS 757,827 Middleton Apr. 19, 1904 1,252,680 Flora Ian. 8, 1918 1,527,021 Wandel Feb. 17, 1925 1,914,845 Cook June 20, 1933 2,268,236 -Baird Dec. 30, 1941 2,741,420 Bodard Apr. 10, 1956